Face plate for a vehicle audio system



FIG. 1 is a perspective view of a face plate for a vehicle audio system showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan thereof.

The broken lines shown in the drawings form no part of the claimed design. 

The ornamental design for a face plate for a vehicle audio system, as shown and described. 